Author:Mabaso, M; Twala, B; Withey, Daniel JDate:Sep 2013Tracking of multiple bright particles (spots) in fluorescence microscopy image sequences is seen as a crucial step in understanding complex information in the cell. However, fluorescence microscopy generates high a volume of noisy image data ...Read more
Author:Copeman, JH; Von Wolff, WTEDate:1968When certain component, in a mixture with other components, has to be determined in a sample, one cannot directly compare line intensities of the pure component, proposed under identical conditions as the sample, because of the absorption ...Read more
Author:Jamison, Kevin A; Rossouw, Pieter S; Miles, EliznaDate:Sep 2017When a new store is integrated with an aircraft, it is necessary to verify that it separates safely for all possible release and emergency jettison scenarios. A large number of store separation analyses are required to comply with this ...Read more
Author:Jamison, Kevin A; Rossouw, Pieter S; Miles, EliznaDate:Sep 2017When a new store is integrated with an aircraft, it is necessary to verify that it separates safely for all possible release and emergency jettison scenarios. A large number of store separation analyses are required to comply with this ...Read more
Author:Dudley, Angela L; Litvin, IA; Forbes, ADate:Mar 2012In this work we derive expressions for the orbital angular momentum (OAM) density of light, for both symmetric and nonsymmetric optical fields, that allow a direct comparison between theory and experiment. We present a simple method for ...Read more
Author:Abia, ALK; Ubomba-Jaswa, Eunice; Genthe, Bettina; Momba, MNBDate:Oct 2016Although higher microbial concentrations have been reported in sediments than in the overlying water column, most quantitative microbial risk assessment (QMRA) studies have not clearly indicated the contribution of sediment-borne pathogens ...Read more
Author:Dudley, Angela L; Schulze, C; Litvin, I; Duparré, M; Forbes, ADate:Aug 2013Although many techniques are efficient at measuring optical orbital angular momentum (OAM), they do not allow one to obtain a quantitative measurement for the OAM density across an optical field and instead only measure its global OAM. Numerous ...Read more
Author:Uys, Hermann; Bassa, H; Du Toit, P; Ghosh, S; Konrad, TDate:Jun 2018Measurement combined with feedback that aims to restore a presumed premeasurement quantum state will yield this state after a few measurement-feedback cycles even if the actual state of the system initially had no resemblance to the presumed ...Read more
Author:McLaren, M; Romero, J; Giovannini, D; Galvez, EJ; Padgett, MJ; Forbes, ADate:Jul 2013Typically, a Gaussian mode is used to pump a non-linear crystal to produce pairs of entangled photons. We demonstrate orbital angular momentum (OAM) entanglement when a non-fundamental mode is used to pump a non-linear crystal. An approximation ...Read more
Author:Greben, JMDate:2011A new application of quantum field theory is developed that gives a description of the internal dynamics of dressed elementary particles and predicts their masses. The fermionic and bosonic quantum fields are treated as interdependent fields ...Read more
Author:Fosu, EA; Obuah, C; Hamenu, L; Aniagyei, A; Ainooson, MK; Govender, Krishna KDate:Aug 2021Transition-metal-mediated oxygen transfer reactions are of importance in both industry and academia; thus, a series of rhenium oxo complexes of the type ReO3L (L=O-, Cl-, F-, OH-, Br-, I-) and their effects as oxidation catalysts on ethylene ...Read more
Author:Sephton, Bereneice; Dudley, Angela L; Forbes, ADate:Dec 2017Bereneice Sephton, Angela Dudley and Andrew Forbes explain the importance of random motion. So, what exactly is random motion? The answer can be dated back to 1827 when a botanist, Robert Brown, noted the movement of pollen floating on water ...Read more
Author:Bogaers, Alfred EJ; Kok, S; Reddy, BD; Franz, TDate:Sep 2014In this paper we introduce a new multi-vector update quasi-Newton (MVQN) method for implicit coupling of partitioned, transient FSI solvers. The new quasi-Newton method facilitates the use of 'black-box' field solvers and under certain ...Read more
Author:Haelterman, R; Bogaers, Alfred EJ; Degroote, J; Boutet, NDate:Aug 2017Often in nature different physical systems interact which translates to coupled mathematical models. Even if powerful solvers often already exist for problems in a single physical domain (e.g. structural or fluid problems), the development ...Read more
Author:Abdul Gaffar, MY; Nel, Willem AJ; Inggs, MRDate:Oct 2008Inverse synthetic aperture radar (ISAR) is an imaging technique that is dependent on an object’s rotational motion over a coherent processing interval. Maritime vessels and aircraft possess 3-D rotational motion, whereas it is only their ISAR ...Read more
Author:Goyal, SK; Boukama-Dzoussi, PE; Ghosh, S; Roux, FS; Konrad, TDate:Apr 2014Quantum teleportation, the transfer of the state of one quantum system to another without direct interaction between both systems, is an important way to transmit information encoded in quantum states and to generate quantum correlations ...Read more
Author:Klarman, S; Meyer, TDate:Jun 2014SQL:2011, the most recently adopted version of the SQL query language, has unprecedentedly standardized the representation of temporal data in relational databases. Following the successful paradigm of ontology-based data access, we develop ...Read more
Author:Salmon, BP; Olivier, JC; Kleynhans, W; Wessels, Konrad J; Van den Bergh, FDate:Jul 2009This paper shows that a feedforward Multilayer Perceptron (MLP) operating over a temporal sliding window of multispectral time series MODerate-resolution Imaging Spectroradiometer (MODIS) satellite data is able to detect land cover change ...Read more
Author:Nienaber, S; Funke, Nicola SDate:01 Sep 2010The South African water sector faces challenges that need to be addressed through effective policy development and implementation. Sound evidence, based on researched consideration of issues and solutions, is an important input to policy ...Read more